Electrical valve grinder and drill



G. F. KRIESEL ILICIRICAL VALVE GRINDER AND DRILL 2 shun-sheet 1 Sept. 1,1925.

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G. F. KRlEsEL ELECTRICAL VALVE GRINDER AND DRILL Filed April 17, 1922- 2ShQOtl-Sht 2 it appe declare the followi exact description o theinvention, such as,

i Patentedl Sept. '1,

j .UNITED AsfrA'rr-:S

A .Il 1,551,752* PATE NT- OFFICE. p

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Be it known that I, GUsrAvn F. Kluun, a citizen of the United States,residing at Minnea in rthe county of Hennepin and State o Minnesota,have invented certain new and useful. Im rovements in Electrical lValveGrinders an Drills; and I do hereby to be a full, clear, and

will enable others skilled in the art to which rta-ins to make and usethe same. This invention relates to a hand drill or l valve grindingtool and particularly to such convenient a tool equipped with anelectric motor and adapted to e electrically driven.

It is an object of this invention to provide [such a tool enclosed in asimple and compact casing having no objectionable projecting arts andhaving an operating spmd e projecting at one end and a comfortable andgrip handle at the other end of the casing.

It is a furtherobject of this invention to provide means for controllithe speed of the motor, which means is isposed in the casing and has ahandle for manipulating the same projecting to the outside of thecasing. This handle is arranged in convenient relation to the griphandle of the tool sothat the tool can be firmly held in ositionand thespeed of the motor controlle by the same hand.

It is another object of the invention to provide a driving connectionbetween the motor shaft and the operating spindle of the tool, wherebthe spindle can be either rotated or oscillated when the motor is run.-ning and it is a still further obj ect of the invention to provide meanson the outside of the tool for adjusting the driving mechanism, asstated, and holding the same in adjusted position. 5

These and other obj ects .and advantages of the invention will be fullyset forth 1n the following description made in connection with the accomanying drawings in which like reference c aracters refer to the sameparts throughout the different views, and in which i Fig. 1 is a view inside elevation of the tool Fig. 2 is a vertical central section of thetool as seen in Fig. 1;

Fig. 3 is a transverse section taken on the line 3-3 of Fig. 2;'

, in, the upper part being removed; and

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Fig. 4 is a fragmentary section similar to the se'ction shown in Fig. 2"

Fig. 5 is a plan view of the lower of the casing and the parts containthere- Fig. 6 is a plan view of the lower part of the casing similar toFig. 5, with'some of the parts thereof removed. g

I Refernng to the drawings, the device cmprises a casing having acentral section 1 of cyhndrical shape but having vat its lower edge aflange extendin thereabout,'whichis projected at one side o the casingto form a projecting step or flange 1. The casing 1 is ormed at' its topportion with a shoulder and the to tom cylin rical portion ittin overthis shoulder and lying flush with t e section 1.

,This section is firmly and ri 'dly securedy to section 1 b boltspassing t rough the top thereof -an engging a transverse web extendlngacross t e top ofsection' 1. The uper part of sect1on'2 1s formed as agrip hanle 2l extending across said section. The lower section'3 of thecasing is provided and is of the same shape and size as the flange atthe bottom of section 1 to which it is secured by spacedbolts. Thesection 3 has a cylindrlcal projection 3 at its lower. portion and asmaller extension 3" projecting downwardly therefrom.`

The various sections of the casing are formed hollow and the projection3 of section 3 is suitably bushed to provide the bearmg for an operatingspindle 4 projecting below the same, the lower end of which is rovidedwith a chuck adapted to hold a. rill or other tool, which chuck is ofthe usual spindle 4 is provided at its up er end with s iding arms 4 andis held om vertical movement by a collar 6 contacting an antifrictionbearing disposed in the lower end of the `extension 3". Y

The main section 1 of the casing is provided with inwardly projecting,diametrically oppositely arranged lugs 1 to which are bolted the frameor pole pieces 7 of an electric motor, the field coils of which areshown as 8, which coils are suitably mounted and held in position in theframe member 7. The armature of the motor is desi nated as 9 and withthe commutator 10 1s rtion i section of casing 2 has. its botmounted ona motor shaft 11 suitably journaled in bearings formed in transversepartitions at the top and bottom of sect1on 1. The electrical' leads inthe motor are designated as 12 and pass out of the cas1ng 1 through aninsulating bushing lnserted 1n the side thereof adjacent its 'topportion andA a rheostat 13 is secured in the lower hollow part ofsection 2 for controlling the .speed of said motor. This rheostatcomprises a contact forming lever pivoted at one end and having a handleportion 14 at its other end,` which lever is adapted to swingsuccessively into contact with a series of resistance controllingcontacts 14, It will be noted that the lever projects outside of thecasing at one side of section 2 through the slot 2b so that the handle14 is disposed beneath the handle 2"?. The motor shaft is equip ed nearthe bottom of section 1 with a coo ing fan 15 and air is drawn throughapertures 1" and blown up past the motor parts into section 2 and outthrough apertures formed therein and through the handle 2.

The lower end of the motor shaft 11 cary ries a small pinion 16 shown asin the form 'has a hub 19* journaled about the motor shaft 11, aboutwhich the said arm is adapted to swing, andthe arm is further providedwith a circular disk portion'19b having a slight shoulder at itsperipheral edge and this disk portion and shoulder are arranged to bearagainst and be guided by the side wall of the casing section 1 and torest upon a ledge formed in said casing, as

f clearly shown in Figs. 2 and 5. The member 19 is also provided with alaterally projecting arm 19c in whichis secured an upstanding stemmember 20, which member is adapted to pass upwardly through a slot 21:formed in the flange 1a and which extends concentrically about thecenter of shaft 11. The slot 21 is provided at each endwith a shallowcylindrical recess opening upwardly of the flange 1". A sleeve member 22is rotatably mounted on the stem member 20 and has an enlarged bore atits upper end adapted to receive a coiled spring which is held thereinby a headed screw -threaded into the top of the member 20,-the head ofwhich screw is of slightly less diameter than the diameter of said bore.The sleeve 22 has a projecting knurled flange at its upper portion andis provided at its lower ortion with a short reduced ortion or shou derof a diameter to lit in t e cylindrical recesses at the ends of the slot21. With this structure, it is apparent that the sleeve 22 can be raisedto bring its shouldered end out of the recesses and then moved along tomove the stem 2() in slot 21 and to swing arm 19 about shaft 11.

The operation of the device is as follows: If the tool is to be used asa drill, the sleeve 22 will be disposed in the recess of slot 21 shownat the upper portion of Fig. 3 or to brin the arm 19 into the .positionshown in ig. 5. In this position, the axis of gear 17 is alined with theaxis of spindle 4. The current now being turned on, the motor will drivethe gear 17 through the pinion 16 and ear 17 will drive spindle 4through the b ock 18. The block 18, as clearly shown in Fig. 5, willmove about the center, of the spindle and said spindle will thus berotated.

If an oscillation of spindle 4 is desired, as'

when the tool is usedto grind valves, the sleeve 22 will be moved intothe recess at the other end of the slot 21, to swing arm 19 about shaft11 into the position shown in Fig. 6. Gear 17 is now brought intoeccentric relation with s indle 4 and when the gear is driven, the b ook18 will move about the center-of gear 17 but entirely at one side of thecenter of spindle 4 and the arm 4 and spindle 4 will thus merely beoscillated. The driving mechanism will thus be shifted to ive either therotatable movement of spindle 4 or the oscillating movement thereof andsaid mechanism will be held in its adjusted position by the engagementof sleeve 22 with the appro riate recess.

The speed of the motor can regulated as desired by the rheostat 13 andthe handle 14 for regulating the same can be conveniently moved by thefingers of the same hand that is gripping the handle 2 and manipulatingthe tool.

From the above description it is seen that applicant has provided asimple, compact and efficient electrically operated tool. The casingenclosing the same is comparatively smooth and has few projecting parts.The tool can be conveniently manipulated b and brought to the desiredoperating position by the handle 2a and the speed thereof can beconveniently regulated by handle 14. The operating parts are allcontained in the casing which will be substantially dust proof, saidparts are few in number and when once assembled, require littleattention for maintenance or repair.

It will, of course, be understood that various changes may be made inthe form, details and arrangement of the arts of a plicants devicewithout departing from t e scope of his invention, which, generallyAstated, consists in the matter shown and described and set forth in theappended claims.

What is claimed is:

1. A tool of the class described having in combination, an operatingspindle having a slotted arm at its inner end, a driving shaft, aconnection between said spindle and driving shaft including a pinion onsaid shaft, a gear driven by said pinion having a block eccentricallylsecured thereto and disposed in the slot of said slotted arm, and

means mounted for swinging movement about the axis of said drivlng shaftcar ing said gear whereby said gear can e swung to bring it and the saidspindle into axial alinement or into eccentric relation.

2. A tool of the class described, comprising. a casing, a spindleprojecting at one end thereof, a slotted arm r1 idly secured to the sindle at its inneren a gear disposed a ove said arm and having arotatable block eccentrically mounted thereon, said block being disposedin the slot of said slotted arm, a pinion driving said gear and aswinging arm carrying said gear, means for swln'ging said arm to movesaid gear and spindle into axial alinement or into eccentric relation,and means secured to said arm and projecting outside of the casing forswinging said arm and holding the same in adjusted position.

3. A tool of the class describedhaving in combination, a casing, anoperating spindle journaled therein and projecting from its lower end, amotor in said casing,- a motor shaft journaled in said casing, a geardriven from said shaft and havin means secured thereto for driving saidspindle', saidy ear being mounted in a member swingable agout said motorshaft, and means connected to said member and extending outside of saidjournaled therein and projecting lsaid s indle and movable to swincasing for swinging the same to bring said gear and spindle into axialallnement or into eccentric relation.

4. A vtool of the class described having in combination, a casing, anoperating spindle journaled therein and projecting from one end thereof,a motor and motor shaft journaled in said casing, a gear driven fromsaid shaft and having a driving connection with said spindle including asllding member, an arm arranged for swinging movement about said motorshaft on which said gear is mounted, a spindle secured to said arm andprojecting through a,slot in said casing, and4 a handle outside of saidcasing secured to said arm to bring said gear and spindle into axialalinement' or into eccentric relation.

n 5f, A tool vof the class described having' in Hcombination, a casing,an `operating spindle om one end thereof, a driving shaft insaid casing,

a gear driven from said shaft, an arm mounted for swinging movementabout the driving shaft having a semicircular portion engaging the wallof the casing for guiding movement, said gear being journaled in andcarried by said arm, and means connected to said arm and projectingoutside of the casing for swinging the same. 6. A tool of the classdescribed having in combination, a casing, an operated spindle journaledtherein and projecting from the lower end thereof, a driving shaft insaid casing, means connecting said spindle and driving shaft including acontinuously rotated gear, means connecting said ear and spindle forrotating said spindle or or oscillating said spindle, and means foi`adjusting said means by swinging said gear about an axis spaced from andparallel to its axis so that said spindle will be either continuouslyrotated or oscillated. r

7. A tool of the class described having in combination, a generallycylindrical casing, a grip handle secured to and extending across thetop of said casing, said casing having alateral rojection at its loweren formingla ste t ereon, an operating spindle j ournaled 1n saidcasing, a driving shaft journaled in. said casing, an adjustable drivingconnection between said driving shaft and spindle whereby said spindlecan be rotated or oscillated, and means movable outside o-f said casingand -on said step for adjusting the driving mechanism. Y 8; A tool ofthe class described having in combination, a casing, an operated spindlejournaled therein and projecting from the lower end thereof, a drivingshaft insaid casing, mechanism' connected to and operated from saidshaft for driving said spindle, said mechanism being swingable about theaxis of said driving shaft, and means disposed outside of said casingfor swinging said mechanism into different positions, said mechanismbeing constructed and arranged so that in one position it will rotatesaid spindle and when in another position will oscillate said spindle. I

9. A tool of the class described having in combination, a casing, anoperating spindle journaled therein and projecting therefrom, a drivinslaft in said casing, mechanism connecte for driving said spindleincluding a driving gear, said mechanism and gear being swingable aboutthe axis of sald drivingl shaft, and means for swinging said mechanisminto different positions, said mecha# nism being constructed andarranged so that in one position it will rotate said spindle 'and whenin another position will oscillate said spindle.

In testimony whereof I atlxl my ature.

GUSTAVE F. KRI SEL.`

to and operated from said shaft`

